How to calculate crystallite size from XRD (Theta-2 Theta) plot of polycrystalline thin film?

I did the calculation using Scherrer's formula (D= Lambda/ Bita*cos(theta)). FWHM calculated from the XRD plot using Origin pro (multiple peak fit to deconvolute overlapped peaks and peak analyser...

23 July 2016 343 11 View